I've been using Opera GX for over a year and never had this problem, but yesterday, while I was using the browser, it closed by itself. When I reopened it, I realized I was logged out of all my accounts on websites. I logged into all of them again, and this morning, when I went to use the computer, I was logged out of all my accounts again, just like what happened yesterday.

For some reason, when I type something, Opera isn't making any noise, the sounds of opening and closing a tab don't work either, but when I play a video for example, the sound comes out normal